Browsing by Author "Corcoran, Louis G"

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    Data for Evolving Mineralogy and Reactivity of Hematite-Coated Sands During Reduction by Fe(II) of 4-Chloronitrobenzene in Column Reactors
    (2024-10-14) Harris, Celina M; Soroush, Adel; Hildebrandt, Alanna M; Amen, Kamilah Y; Corcoran, Louis G; Feinberg, Joshua M; Arnold, William A; Penn, R Lee; arnol032@umn.edu; Arnold, William; Arnold, Penn and Feinberg labs at the University of Minnesota
    This study explores the reaction of contaminants mediated by iron oxide minerals in a column reactor that simulated iron reducing groundwater conditions. Reaction of the model nitroaromatic pollutant with hematite-coated sand in column reactors leads to growth of goethite and evolving reactivity due to changes in accessible surface area. Data collected include concentrations of the model pollutant (4-chloronitrobenzene) and its reaction product, the amount of new iron oxide mineral formed, and chloride concentrations in tracer studies.
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    Investigation of Cost-Effective Alternative Materials For Dispersant Effectiveness Tests
    (2022-08-31) Gwaltney, Erin A; Corcoran, Louis G; McCormick, Alon
    Currently, researchers are investigating the effectiveness of several potential dispersant blends consisting of food-grade surfactants, Lecithin, Tween-80, and Span-80, in order to replace commonly used marine oil dispersants that may pose environmental harm. The effectiveness of these blends is explored using phase boundary determination and the EPA's baffled flask test which examine the ability of a surfactant to form stable oil-water dispersions. However, when introducing and exploring this facet of green chemistry at a high school or general chemistry level, the accessibility of specialized instruments, apparatus, and materials is limited. This project investigated the potential of dish soap and laundry detergent to provide a cost-effective alternative to Tween-80 and Span-80. Similarities in results from the baffled flask tests and phase boundary determination tests demonstrated that dish soap and laundry detergent were found to be suitable cost-effective alternatives to Tween-80 and Span-80 for high school and general chemistry teaching laboratories. However, given the ongoing nature of this project, these are only preliminary conclusions and should not be cited.